Wire grinder



. May 25,1943;

J. H. JAECKER 2,319,998 I WIRE GRINDER Filed July 31, 1941 3 Sheets-Sheet 1 I v Mrs?- a/r j: $4.?

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WIRE GRINDER v May 25,- 1943. JQH. JAECKER wnw GRINDER Filed July' 31, 1941 3 Slfieets-Sheet s A Home] Patented May 25, 1943 UNITED STATES PATENT OFFICE 2,319,998 WIRE GRINDER John H. J aecker, Massillon, Ohio Application July 31, 1941 Serial No. 404,903

1 Claim. (01. 51--88) The present invention relates to new and useful improvements in wire grinders and has for one of its important objects to provide, in a manner as hereinafter set forth, a machine of this character which is adapted to grind the wire circumferentially and without the necessity of cutting said wire into straight lengths.

Another very important object of the invention is to provide a wire grinder of the aforementioned character embodying a novel construction, combination and arrangement of parts whereby the wire may be uncoiled, drawn through the machine and oscillated, and then recoiled.

Other objects of th invention are to provide a wire grinding machine which will be comparatively simple in construction, strong, durable, highly efficient and reliable in use, compact and which may be manufactured at low cost.

All of the foregoing and still further objects and advantages of the invention will become apparent from a study of the following specification, taken in connection with the accompanying drawings wherein like characters of reference designate corresponding parts throughout the several views, and wherein:

Figure 1 is a top plan view of a wire grinding 1 machine constructed in accordance with the present invention.

Figure 2 is a view in front elevation thereof.

Figure 3 is a vertical sectional view, taken substantially on the line 3--3 of Figure 2.

Figure 4 is a vertical sectional view, taken substantially on the line 4--4 of Figure 3.

Figure 5 is a cross-sectional view, taken substantially on the line 5-5 of Figure 3.

Figure'fi is a view showing, in cross-section, the wire before it enters the machine, after it has been ground by the first pair of grinding wheels in the machine, and the finished wire.

Referring now to the drawings in detail, it will be seen that the embodiment of the invention which has been illustrated comprises a suitable supporting structure which is designated generally by reference numeral I. The supporting structure I includes spaced uprights 2 and 3 which rise from a base portion 4.

The upright 2 has formed therein vertically elongated openings 5 and an intermediate circular opening 6. The openings 5 and 6 are vertically aligned in the upright 2. Secured in any suitable manner on the upright 2 is a dovetail guide I of suitable metal. The guide I has formed therein openings 8 which communicate with the openings 5 and an opening 3 which communicates with the opening 6.

Vertically movable bearings ID are operable in the openings Sand 8, said bearings projecting from blocks I I which are slidably mounted on the guide I. Shafts I2 are journaled in the bearings II). A pair of vertically aligned grinding wheels I3 are mounted on the inner end portions of the shafts I2. Projecting from the guide I at an intermediate point is a vertical bearing I4. A vertical shaft I5 is journaled at an intermediate point in the bearing I4. Above and below the bearing I4 the shaft I5 is provided with oppositely threaded portions I6. The blocks I I of the bearings II] are threadedly connected at I! to the portions I6 of the shaft I 5 for actuation in opposite directions by said shaft. The upper end portion of the shaft I5 is adapted to receive a suitable wrench or crank I8 for rotating said shaft.

Journaled for oscillation in the opening 6 is a tube I9. Projecting from the outer end of the tube I9 is a plate 20. Rotatably mounted on the plate 20 is a pair of opposed, coacting tension rolls 2| between which the finished wire passes as it leaves the machine. Any suitable means as at 22 (see Fig. 5) may be provided for tensiom'ng the rolls 2|.

Mounted horizontally on the upright 3 is a dovetail guide 23 which is substantially similar to the guide I. Slidable on the guide 23 is a pair of transversely opposed peripheral grinding wheels 24. The grinding wheels 24 are operable in the upright 3 and on the guide 23 in a manner substantially similar to that of the wheels I3 with the exception that said wheels 24 are adjustable toward and away from each other in a horizontal plane. Toward this end, a manually operable horizontal screw shaft 25, comprising oppositely threaded portions 26, is journaled, at an intermediate point, on the guide 23. The blocks 21 of the bearings in which the shafts of the grinding wheels 24 are journaled are threadedly connected to the portions 25 of the shaft 25 in a manner similar to the connectionbetween the elements II and the shaft I5.

The upright 3 is further provided with a circular opening 28 which is aligned with the opening 6. Journaled for oscillation in the opening 28 is a tube 29. Projecting from the outer end of the tube 29 is a plate 30. A plurality of straightening rolls 3I are rotatably mounted on the plate 30. Also mounted on the plate 30 is a rounding die 32 through which the wire passes after said wire leaves the straightening rolls 3|.

The plates 20 and 30 are connected for oscillation in unison by means including a longitudinal shaft 33 which is journaled in bearings 34 provided therefor on the upper ends of the uprights 2 and 3. Fixed n the shaft 33 are arm 35. Rods 36 connect the arms 35 to arms 31 which project from the oscillating plates and 30. A suitable independent drive 38 is provided for oscillating the plates 20 and at comparatively low speed.

Journaled in suitable bearings 39 on the supporting structure I are shafts 40. The shafts 40 may be driven from any suitable source of power at the desired speed. The grinding wheels l3 and 24 are driven from the shaft 40 through belt and pulley connections 4!. 2 of the drawings, one of each of the pairs of grinding wheels l3 and 24 is driven by one'of the shafts 4!]. Suitable tighteners 42 are pro vided for the drive belts 4 I.

It is thought that the operation of the machine will be readily apparent from a consideration of the foregoing. Briefly, the wire to be ground passes between the straightening rolls'3l on the plate 30, then through the rounding die 32 and then through the tube 29. In Figure 6 of the drawings, 43 designates the wire. When it emerges from the tube 29 the wire 43 passes be tween the grinding wheels 24, then between the grinding wheels l3 and said wire leaves the machine through the tube I9, passing between the roll 2|. As the wire passes through the machine it is continuously oscillated by the plates 20 and 30. Thus, as the wire passes between the wheels 24 the diametrically opposite side portions of the stock'are removed, as at 44 (see Fig. 6). Then, when the Wire passes through the second pair of wheels l3 the upper and lower As seen in Figure portion 45 are taken off. As indicated by the arrows in Figure 2 of the drawings, all of the grinding wheels l3 and 24 rotate in the same direction. Thus, the grinding forces do not add up and tend to force the wire out from between either pair of wheels, but instead cause a torque in said wire. When the wire leaves the machine it is as seen in the third or last view of Figure 6 of the drawings. As hereinbefore indicated, the pairs of grinding wheels I3 and 24 are expeditiously and accurately adjusted toward and away from each other through the medium of their respective screw shafts l5 and 25.

It is believed that the many advantages of a wire grinder constructed in accordance with the present invention will be readily understood, and

although a preferred-embodiment of the machine is as illustrated and described, it is to be understood that changes in the details of construction and in the combination and arrangement of part may be resorted to whichwill fall within the scope of the invention as claimed.

What is claimed is: r

A wire grinder comprising a supporting structure, a pair of aligned tubes, for the passage-of a strand of wire, journaled on said supporting structure, plates on the-outer ends of said tubes, a shaft journaled on the supporting structure, arms fixed on said shaft, arms fixed on the plates, rods connected to the first and second-named arms for connecting the plates and the tubes for actuation in unison, means for oscillating the plates and the tubes, grinding wheels rotatably mounted on the supporting structure and engageable with the wire between the tubes, and means for actuating said grinding wheels.

JOHN H. JAECKER. 

